Don Arnold

What is the best application,free air or fan cooled for my thruster where would i get a air scoop if free air is the way to go, cheers, Steve.

I was the same when I bought my PFX. I was using telex ANR which were also very good, but PFX was better fit and I thought the ANR was better (Telex has better passive noise reduction). At first I was not real impressed, mine have been unreliable as well. But now I have grown to really like them, and I must admit the after sales service is good.Interesting point about noise that I discovered on the motorcycle, if I dont have earplugs in at highway speeds the noise is actually a distraction and affects my riding. I cant say I have noticed that in the air, but I wouldn't be surprised if there is some marginal effect. Perhaps I have not noticed yet because I am still a relatively fresh pilot (just over 200 hours).

The tail surfaces on my wooden Heath Midwing replica were quite thick, so B worked well. My FlightWorks Capella flies nicely with just enough spring to hold the unbalanced elevator horizontal. I wouldn't have thought of it until I remembered the old Pipers had a powerful up spring, if it broke in flight you had to hold the nose up all the way home. Rinker Bucks' "Flight of Passage". They didn't know about the spring. When it broke inflight they thought they had a life-threatening problem. Of course, you would know better.

Flight of Passage: A 15 and 17 year old take a PA11 across the USA in the early 1960's. Great book.

Back in the 1960's the moaning began about what to do when the supply of 65hp Continentals dried up. You can still get them, and any part you need. I wouldn't worry about the 503. It still the most reliable 2-stroke out there. My friend and I both tried Hirths, but went back to 503's. I hope the MZ's work out, but I'm done being a pioneer.